﻿<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>CSS3加载动画</title>

<style>
body {
  overflow: hidden;
  background:#000;
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
  animation-delay: 1s;
}

.item-1 {
  width: 20px;
  height: 20px;
  background: #f583a1;
  border-radius: 50%;
  background-color: #eed968;
  margin: 7px;
  display: flex;
  justify-content: center;
  align-items: center;
}
@keyframes scale {
  0% {
    transform: scale(1);
  }
  50%,
    75% {
    transform: scale(2.5);
  }
  78%, 100% {
    opacity: 0;
  }
}
.item-1:before {
  content: '';
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: #eed968;
  opacity: 0.7;
  animation: scale 2s infinite cubic-bezier(0, 0, 0.49, 1.02);
  animation-delay: 200ms;
  transition: 0.5s all ease;
  transform: scale(1);
}

.item-2 {
  width: 20px;
  height: 20px;
  background: #f583a1;
  border-radius: 50%;
  background-color: #eece68;
  margin: 7px;
  display: flex;
  justify-content: center;
  align-items: center;
}
@keyframes scale {
  0% {
    transform: scale(1);
  }
  50%,
    75% {
    transform: scale(2.5);
  }
  78%, 100% {
    opacity: 0;
  }
}
.item-2:before {
  content: '';
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: #eece68;
  opacity: 0.7;
  animation: scale 2s infinite cubic-bezier(0, 0, 0.49, 1.02);
  animation-delay: 400ms;
  transition: 0.5s all ease;
  transform: scale(1);
}

.item-3 {
  width: 20px;
  height: 20px;
  background: #f583a1;
  border-radius: 50%;
  background-color: #eec368;
  margin: 7px;
  display: flex;
  justify-content: center;
  align-items: center;
}
@keyframes scale {
  0% {
    transform: scale(1);
  }
  50%,
    75% {
    transform: scale(2.5);
  }
  78%, 100% {
    opacity: 0;
  }
}
.item-3:before {
  content: '';
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: #eec368;
  opacity: 0.7;
  animation: scale 2s infinite cubic-bezier(0, 0, 0.49, 1.02);
  animation-delay: 600ms;
  transition: 0.5s all ease;
  transform: scale(1);
}

.item-4 {
  width: 20px;
  height: 20px;
  background: #f583a1;
  border-radius: 50%;
  background-color: #eead68;
  margin: 7px;
  display: flex;
  justify-content: center;
  align-items: center;
}
@keyframes scale {
  0% {
    transform: scale(1);
  }
  50%,
    75% {
    transform: scale(2.5);
  }
  78%, 100% {
    opacity: 0;
  }
}
.item-4:before {
  content: '';
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: #eead68;
  opacity: 0.7;
  animation: scale 2s infinite cubic-bezier(0, 0, 0.49, 1.02);
  animation-delay: 800ms;
  transition: 0.5s all ease;
  transform: scale(1);
}

.item-5 {
  width: 20px;
  height: 20px;
  background: #f583a1;
  border-radius: 50%;
  background-color: #ee8c68;
  margin: 7px;
  display: flex;
  justify-content: center;
  align-items: center;
}
@keyframes scale {
  0% {
    transform: scale(1);
  }
  50%,
    75% {
    transform: scale(2.5);
  }
  78%, 100% {
    opacity: 0;
  }
}
.item-5:before {
  content: '';
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: #ee8c68;
  opacity: 0.7;
  animation: scale 2s infinite cubic-bezier(0, 0, 0.49, 1.02);
  animation-delay: 1000ms;
  transition: 0.5s all ease;
  transform: scale(1);
}
</style>
</head>
<body>

<div class="container">
  <div class="item-1"></div>
  <div class="item-2"></div>
  <div class="item-3"></div>
  <div class="item-4"></div>
  <div class="item-5"></div>
</div>

</body>
</html>
